comp.lang.idl-pvwave archive: archive » Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented?

Home » Public Forums » archive » Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? [message #55384 is a reply to message #55291]

Thu, 16 August 2007 12:54

rclark
Messages: 12
Registered: September 1992

Junior Member

In version 6.4 I think you need to explicitly enable wheel events to
have them passed through to your event handler.

In my case the wheel was just a source of noise to be ignored. If you
will be using the wheel then you may also need to guard against
accidental button presses on the middle button when you meant the
wheel:-) But then I think the TYPE tag on the event structure may have
a distinct value for wheel events too... I was only interested in
silencing the thing.

Richard

In article <fa253r$8er$1@news.nems.noaa.gov>,
Paul van Delst <Paul.vanDelst@noaa.gov> wrote:
> Richard Clark wrote:
>> Yes, I have encountered this too. We use intel linux systems with pc
>> type wheel mice.
>>
>> Neither the bu... I mean feature, nor its fix (in version 6.4) seems
>> to be documented.
>>
>> After checking event.type for UP, DOWN, or MOTION mouse events, check
>> for PRESS or RELEASE values >4.
>>
>> Here is a code snippet from a heavily modified version of Fanning's
>> DRAWBOX_WIDGET example procedure that I use to get around it.
>> It looks like you've already found the same fix.
>
> Similar. I now use the following:
>
> FUNCTION WPLOT_Which_Button, Value
> CASE Value OF
> 1: e='LEFT'
> 2: e='MIDDLE'
> 4: e='RIGHT'
> 8: e='UP'
> 16: e='DOWN'
> ELSE: e='NONE'
> ENDCASE
> RETURN, e
> END
>
> and call it thusly:
>
> IF ( WPLOT_Which_Button(event.RELEASE) EQ 'LEFT' ) THEN BEGIN
> ....
>
>
> I decided to use the CASE statement since one can't rely on the 8 and 16 values remaining
> valid (and apparently, in v6.4, they're not)
>
> cheers,
>
> paulv

Report message to a moderator

[Message index]

		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: Paul Van Delst[1] on Thu, 16 August 2007 11:30
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: rclark on Thu, 16 August 2007 10:39
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: David Fanning on Thu, 16 August 2007 07:18
		Re: WIDGET_DRAW event.press/release values for mouse wheel events..undocumented? By: rclark on Thu, 16 August 2007 12:54

Previous Topic:	Re: Using FSC_COLOR with postscript devices
Next Topic:	WIDGET_DRAW event.press/release values for mouse wheel events..undocumented?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 18:43:36 PDT 2025

Total time taken to generate the page: 1.60273 seconds